alongside (of) so or sth meaning

[American slang]
as compared with a person or a thing. (The things being compared need not be beside one another. Of is normally used before pronouns.)
  Our car looks quite small alongside of theirs.
   My power of concentration is quite limited alongside of yours.

• draw (up) alongside so or sth:    [American slang]to ...
• line up alongside so or sth:    [American slang]to ...
• lay alongside sth:    [American slang][f ...